Hennigh said at this week's Diggers & Dealers mining forum that what the company had seen around Karratha was "absolutely mind-blowing".
"Based on that, we jumped into this project aggressively," he said.
Hennigh said it was about doing the science to unlock the discovery.
"We're exploring it and we're doing it very forensically I'd say," he said.
"We're not looking for grade, but geology. We're trying to...